Oilfield oil sludge treatment method

Abstract

The invention provides an oilfield oil sludge treatment method. Oil sludge is fed into a homogeneous agitation tank at the speed of 4 m<3> / h by a screw feeder and jetted by pressurized hot water at the temperature of 65-80 DEG C, the ratio of oil sludge to water is (1:4)-(1:6), then the mixture is heated to 80-95 DEG C, agents comprising, by concentration, 0.5%-1.2% w / w of a demulsifying agent, 1.0%-2.0% w / w of a gel breaker and 10%-15% w / w of an organic solvent are added and stirred for 60-90 min at the speed of 20-30 r / min, a floating oil liquid is drained, a product is input into a horizontal spiral separating machine for separation at the rotating speed of 2,800-3,000 r / min, the oil liquid after separation enters a trapezoidal sedimentation tank, after natural setting is performed for 4 h under the condition of 85 DEG C, an upper layer oil liquid is recovered, precipitate that does not meet the draining standard is subjected to secondary heating, agent adding, stirring, washing and deoiling disposal, the sand content in oil after final treatment is 0.5%-0.8%, the oil content in silt and sand is 0.3%-2.0%, and the water content in oil is 0.5%-2.0%.

Description

technical field

[0001] The invention relates to oilfield sludge treatment technology, especially for the reprocessing of waste materials, and the integrated treatment effect of the adopted equipment and medicament is excellent. Background technique

[0002] Oily sludge is oily solid waste produced in the process of oil exploitation, transportation, refining, and oily sewage treatment. It has high water content, large volume, complex composition, and difficult treatment. High calorific value and other characteristics, the volume of oily sludge is huge, if it is not treated and discharged directly, it will not only occupy a large amount of cultivated land, but also produce a large amount of malodorous gas, which will pollute the surrounding soil, water, and air. After the petroleum substances in the sludge penetrate into the soil , will adhere to the surface of soil particles, affect the permeability of the soil, hinder the effective soil water conduction channel, reduce the s...

Examples

Embodiment 1

[0032] 1) Select the landed oil sludge in the oil production area of ​​Karamay Oilfield, which is semi-solid and dark brown, with no obvious crude oil accumulation condensate, crude oil and soil are closely attached, and the oil sludge contains 14.30% oil, 34.60% water, and the rest is solid matter .

[0033] 2) Using screw feeder, according to 4m 3 Feed rate per hour pushes the viscous sludge into the hot and high-pressure jet water injection basket, and removes iron metal at the same time. Conditions: heating temperature 90°C, stirring time 60min, solid-liquid ratio 1:4, chemical concentration respectively 0.5% w / w demulsifier, 1.0% w / w gel breaker, 10% w / w organic solvent, start stirring and washing, after heating, medicament, degreasing, aeration homogenization, centrifugal separation and natural sedimentation combined process , The sand content rate in the recovered oil liquid is 0.4%, the oil content rate in the mud sand is 0.3%, and the water content rate in the oil is...

Embodiment 2

[0035]1) The selected oil sludge from Fengcheng Oil Production Plant of Karamay Oilfield is semi-fluid, dark brown, with obvious crude oil accumulation condensate, oil content is 51.30%, water content is 9.25%, and the rest is solid matter. Because the oil sludge comes from the heavy oil production area, it has high content of asphaltene and colloid, and its appearance is relatively viscous and semi-fluid.

[0036] 2) Using screw feeder, according to 4m 3 Feed rate of / h pushes the viscous sludge into the hot and high-pressure jet water injection basket, and at the same time carries out metal adsorption and removal. Conditions: heating temperature is 90°C, stirring time is 80min, solid-liquid ratio is 1:5, and the concentrations of chemicals are respectively Demulsifier 1.0% w / w, gel breaker 1.5% w / w, organic solvent 15% w / w, start stirring and washing, after heating, medicament, degreasing, aeration homogenization, centrifugal separation and natural sedimentation combined pro...

Embodiment 3

[0038] 1) The selected sludge from the No. 5 Oil Production Plant of Karamay Oilfield contains 13.60% oil, 20.25% water, and the rest is solid matter. This sludge is aged sludge stored in the oilfield for a long time, so the content of asphaltene and colloid is high, and there is almost no light component.

[0039] 2) Using screw feeder, according to 4m 3 Feed rate of / h pushes the viscous sludge into the hot and high-pressure jet water injection basket, and at the same time carries out metal adsorption and removal. Conditions: heating temperature 95°C, stirring time 90min, solid-liquid ratio 1:6, chemical concentration respectively Demulsifier 1.2% w / w, gel breaker 2.0% w / w, organic solvent 15% w / w, start stirring and washing, after heating, medicament, degreasing, aeration homogenization, centrifugal separation and natural sedimentation combined process, The recovered oil has a sand content of 0.8%, an oil content of 2.0% in mud and sand, and a water content of 2.0% in oil. ...

technical field

[0001] The invention relates to oilfield sludge treatment technology, especially for the reprocessing of waste materials, and the integrated treatment effect of the adopted equipment and medicament is excellent. Background technique

[0002] Oily sludge is oily solid waste produced in the process of oil exploitation, transportation, refining, and oily sewage treatment. It has high water content, large volume, complex composition, and difficult treatment. High calorific value and other characteristics, the volume of oily sludge is huge, if it is not treated and discharged directly, it will not only occupy a large amount of cultivated land, but also produce a large amount of malodorous gas, which will pollute the surrounding soil, water, and air. After the petroleum substances in the sludge penetrate into the soil , will adhere to the surface of soil particles, affect the permeability of the soil, hinder the effective soil water conduction channel, reduce the s...

Examples

Embodiment 1

[0032] 1) Select the landed oil sludge in the oil production area of ​​Karamay Oilfield, which is semi-solid and dark brown, with no obvious crude oil accumulation condensate, crude oil and soil are closely attached, and the oil sludge contains 14.30% oil, 34.60% water, and the rest is solid matter .

[0033] 2) Using screw feeder, according to 4m 3 Feed rate per hour pushes the viscous sludge into the hot and high-pressure jet water injection basket, and removes iron metal at the same time. Conditions: heating temperature 90°C, stirring time 60min, solid-liquid ratio 1:4, chemical concentration respectively 0.5% w / w demulsifier, 1.0% w / w gel breaker, 10% w / w organic solvent, start stirring and washing, after heating, medicament, degreasing, aeration homogenization, centrifugal separation and natural sedimentation combined process , The sand content rate in the recovered oil liquid is 0.4%, the oil content rate in the mud sand is 0.3%, and the water content rate in the oil is...

Embodiment 2

[0035]1) The selected oil sludge from Fengcheng Oil Production Plant of Karamay Oilfield is semi-fluid, dark brown, with obvious crude oil accumulation condensate, oil content is 51.30%, water content is 9.25%, and the rest is solid matter. Because the oil sludge comes from the heavy oil production area, it has high content of asphaltene and colloid, and its appearance is relatively viscous and semi-fluid.

[0036] 2) Using screw feeder, according to 4m 3 Feed rate of / h pushes the viscous sludge into the hot and high-pressure jet water injection basket, and at the same time carries out metal adsorption and removal. Conditions: heating temperature is 90°C, stirring time is 80min, solid-liquid ratio is 1:5, and the concentrations of chemicals are respectively Demulsifier 1.0% w / w, gel breaker 1.5% w / w, organic solvent 15% w / w, start stirring and washing, after heating, medicament, degreasing, aeration homogenization, centrifugal separation and natural sedimentation combined pro...

Embodiment 3

[0038] 1) The selected sludge from the No. 5 Oil Production Plant of Karamay Oilfield contains 13.60% oil, 20.25% water, and the rest is solid matter. This sludge is aged sludge stored in the oilfield for a long time, so the content of asphaltene and colloid is high, and there is almost no light component.

[0039] 2) Using screw feeder, according to 4m 3 Feed rate of / h pushes the viscous sludge into the hot and high-pressure jet water injection basket, and at the same time carries out metal adsorption and removal. Conditions: heating temperature 95°C, stirring time 90min, solid-liquid ratio 1:6, chemical concentration respectively Demulsifier 1.2% w / w, gel breaker 2.0% w / w, organic solvent 15% w / w, start stirring and washing, after heating, medicament, degreasing, aeration homogenization, centrifugal separation and natural sedimentation combined process, The recovered oil has a sand content of 0.8%, an oil content of 2.0% in mud and sand, and a water content of 2.0% in oil. ...

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